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"These new £1 trial coins are fascinating, especially considering the financial precedent of the £2 trial coins in 1994, which have since become one of the most sought after collectable coins in Britain," explained Alex.

"If these new trial coins turn out to be as valuable as 1994’s, then anyone who gets their hands on them now could be sitting on a future goldmine."

Valuable proofs

Chards is a leading coin and bullion dealer based in the UK. The firm buys and trades coins, jewellery and specialises in valuable gold and silver.

According to the experts, the most valuable of all the £1 coins will be the 'proof' coins - the special pre-production samples - often used for "approval" purposes and produced to a much higher standard of finish.

A Chards statement said: "Bear in mind they are producing over 2.2 billion £1 coins this year.

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"We do not think that the 2017 circulation £1 coin will be a good investment - however, the collector coins such as the silver proof, silver proof piedfort and gold proof will be the ones to invest in."

Alternate design coins coming soon

The first batch of new £1 coins will commemorate the achievements of Jane Austen, Sir Isaac Newton and The Royal Flying Corps - all expert pioneers in their fields.